Cutting attachment for sewing machines



' Jan: 24, 1939.

i w. s. PEPPLER v CUTTING ATTACHMENT FOR 'S'EWING MACHINES Filed May 8, 1957 i 2 Sheets-Shet 1 Inventor fffiep rk I I By v Atibrneys Jan. 24, 1939. w. s. PEPPLER CUTTING ATTACHMENT FOR SEWING MACHINES Filed ma 8, 1957 2 Sheets-Sheet 2 Inventor A fiorneys Patented Jan. 24, 1939 UNITED STATES PATENT OFFICE CUTTING ATTACHMENT FOR SEWING MACHINES William Stuart Peppler, Glen Rock, Pa., assignor of one-half to Allen Spangler, Philadelphia,

Application May 8, 1937, Serial No. 141,523

2 Claims.

for shoulder straps, belt loops, etc., and the invention together with its objects and advantages, will be best understood from a study of the following description, taken in connection with the accompanying drawings, wherein:

Figure 1 is an elevational View of the head portion of a sewing machine having my attachment associated therewith, and

Figure 2 is an end elevational view showing the attachment.

Figure 3 is a sectional view showing a conventional type of feed mechanism for the machine.

Referring to the drawings by reference numerals, it will be seen that 5 indicates the head of a lock-stitch sewing machine suitably mounted on a base I and including among other parts the usual presser foot 2, needle 3, main shaft 4, which latter carries the usual thread take-up wheel 6, hand wheel l6, and driving pulley B.

In accordance with the present invention, there is suitably mounted on the base i, a substantially U-shaped frame 9, the legs ID of which at their upper ends are provided with bearings I l in which is journalled a shaft l2.

On one end of the shaft l2 there is provided a pulley i3 over which is trained a belt l3 that is also adapted to be trained over a pulley l, as shown, and mounted on shaft 4 for driving the shaft l2 from the main shaft 4 of the sewing machine.

The shaft I2 is provided for operating the vertically movable pivotal blade M of a cutter indicated generally by the reference numeral I5 and which also includes a fixed or stationary blade In the present instance, I have shown the cutter l5 mounted rearwardly of the presser foot 2 and transversely to the line of travel of the strip as the latter is being stitched.

A trip arm ll is pivoted at one end as at [8 to a suitable part of the head 5 and is normally urged to swing vertically upwardly through the medium of a suitably provided spring [9.

The free end of the trip arm I! is arranged in the path of a roller 20 provided on a gear 22 mounted on a shaft 23 suitably journalled in a bearing 24 on one of the legs ll] of the frame 9. Intermediate its ends the trip arm I! is connected through the medium of a link 25 with the blade I of the cutter l5 so that, on each revolution of the gear 22 arm I! will be tripped in a manner to cause the blade M to coact with the blade M of the cutter I5 for cutting the stitched strip transversely thereof.

The gear 22 is in constant mesh with a pinion gear 26 provided on one end of the shaft 12.

Thus, it will be seen that drive will be transmitted from the shaft 4 through the pulley belt l3 to the shaft [2 to revolve the gear 22 to thereby operate the cutter l5 for cutting the stitched strip into lengths, and by using different sizes of pulleys I3 and 8, gear 22 will be caused to revolve at the desired speed for operating the cutter 15 to cut the stitched strip into long or short lengths as may be found desirable.

Further in accordance with the present invention I suitably mount on one of the legs I!) of frame 9 a counter 2'! that includes among other parts a crank arm 28 normally urged in one direction through the medium of a suitably pro vided spring 29. For operating the crank arm 28 once for each revolution of gear wheel 22 there is provided on the gear Wheel a second roller 30 that engages the crank arm 28 for swinging the latter against the action of spring 29 to operate the counter so that each time the cutter i5 is operated the counter 2'! will be operated to the end that the one operating the machine may keep track of the number of pieces of lengths into which the strip is cut.

For directing the stitched strip to the cutter l5 as the strip passes under the presser foot 2, there is provided a tubular guide member 3i mounted at an incline as shown in Figure 2 intermediate the presser foot 2 and the cutter l5. Thus it will be seen that the tubular guide 3| is so arranged as to direct the strip between the blades of the cutter i5 so that the strip may be cut into lengths in the manner just described.

It will be also understood that the device may be used for cutting into suitable lengths strips which have been previously stitched, and of course where the stripsto be out have been previously stitched the machine with the cutting attachment applied thereto will of course be without 1 Having just described the invention, what is claimed as new is:

1. A cutting attachment for sewing machines comprising a U-shaped frame supported in upright position rearwardly of the machine, one end of the frame being adjacent the drive end of the machine and the other end of the frame being adjacent the needle end of the machine, a shaft journaled in the upper end of the frame, a belt-driven pulley secured to one end of the shaft and operatively connected with the drive end of the machine, a pinion gear secured to the opposite end of the shaft, a gear journaled on the frame operatively engaged by the pinion, a pin projecting from the last named gear and a cutting mechanism adjacent the needle end of the machine and comprising a stationary blade, a movable blade pivoted at one end to the stationary blade and a pivoted trip arm mounted above and connected to the free end of the movable blade, said trip arm being disposed in the path of said pin for actuating the movable blade upon rotation of said gear.

2. A cutting attachment for sewing machines comprising a U-shaped frame supported in upright position rearwardly of the machine, one end of the frame being adjacent the drive end of the machine and the other end of the frame being adjacent the needle end of the machine, a shaft journaled in the upper end of the frame, a beltdriven pulley secured to one end of the shaft and operatively connected with the drive end of the machine, a pinion gear secured to the opposite end of the shaft, a gear journaled on the frame operatively engaged by the pinion, a pin projecting from the last named gear and a cutting mechanism adjacent the needle end of the machine and comprising a stationary blade, a movable blade pivoted at one end to the stationary blade and a pivoted trip arm mounted above and connected to the free end of the movable blade, said trip arm being disposed in the path of said pin for actuating the movable blade upon rotation of said gear, the cutting edge of said stationary blade being elevated above the working surface of the needle end of the machine and a guide inclined upwardly from said working surface for directing the work into cutting position relative to the blades.

W. STUART PEPPLER. 

